Econar GeoSource PumpPAK GPP 1S25-1-A Installation And Operating Instructions Manual page 5

Top
Fill
and Purge
Valve
ln (from
earth loop)
Bottom
Fill
and
Puge Valve
Out (to earth loop)
Figure
2 -
PumpPAKru Mounted
on Heat Pump
Fill
the purge cart with
water. Rotate the
fill
and purge
valves
on
the
PumpPAKrM
to
the positions shown in
Figure 3
to
flush
the earth
loop.
?op EiU
and.
Surge Vafve
Eallh LooF +- fleat
P!aq)
In
(to
heat
pmp)
Out (from
heat
purp)
Start the pump
to
circulate the water through the
earth
loop.
Maintain
the
level in
the
purge cart by
adding water
to
it
as the
loop
fills.
If
your flushing pump
assembly is
equipped
with
valves
to
reverse the
flow of
the
water
through
the loop
system,
do so
occasionally
to
help
remove trapped
air.
Allow
the
pump
to
run
10
to
15
minutes after
the
last air bubbles
have been removed.
After the
earth
loop
is
completely purged,
add
the
precalculated
amount
of
antifreeze
to
the purge
cart
reservoir. As the
antifreeze
is
pumped into
the loop,
the
return
hose
from
the
earth
loop
should be removed from
the
reservoir
and the initial
flow of
water returning from
the earth loop should
be discarded.
After all
the antifreeze
has been added,
place the return
hose back
in
the purge
cart
reservoir and
continue
until the
antifreeze
is
uniformly mixed
throughout
the earth
1oop.
Once
the
solution
is
mixed,
it
should
be
measured
with
a
hydrometer, refractometer, or
other device
to
determine
the actual freezing
point of
the solution. Remember that
a
low
antifreeze level
may result
in unit
shutdown problems
during cold
weather operation due to loop
temperatures
falling below
the freeze
protection ofthe
loop
solution.
Once the antifreeze solution
has
been mixed, rotate
the
fill
and
purge
valves on the
PumpPAKrM
to
the
positions
shown in Figure 4 to purge
the heat
pump
heat exchanger.
Eurge Pq,
Bott@ FiI1 ed turg.
ValG
I
Earth Iroop ------->
Eeat Pulp
hlEG Cart
j
Figure
3 -Earth
Loop Purge
Setup
J
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